Subtract 63/42 from 54/56
1st number: 54/56, 2nd number: 1 21/42
54/56 - 63/42 is -15/28.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 56 and 42 is 168
Next, find the equivalent fraction of both fractional numbers with denominator 168 - For the 1st fraction, since 56 × 3 = 168,
54/56 = 54 × 3/56 × 3 = 162/168 - Likewise, for the 2nd fraction, since 42 × 4 = 168,
63/42 = 63 × 4/42 × 4 = 252/168 - Subtract the two like fractions:
162/168 - 252/168 = 162 - 252/168 = -90/168 - After reducing the fraction, the answer is -15/28
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